Does continuous straw returning keep China farmland soil organic carbon continued increase? A meta-analysis

The straw returning technique is one of the important measures for soil carbon sequestration and soil organic carbon (SOC) promotion in the world. However, the patterns of straw utilization in China with various methods among regions, the effect and variability of straw returning on SOC in different...

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Bibliographic Details
Published in:Journal of environmental management 2021-06, Vol.288, p.112391-112391, Article 112391
Main Authors: Wang, Yanli, Wu, Pengnian, Mei, Fujian, Ling, Yue, Qiao, Yibo, Liu, Changshuo, Leghari, Shah Jahan, Guan, Xiaokang, Wang, Tongchao
Format: Article
Language:English
Subjects:
Agriculture
Carbon - analysis
China
Climatic condition
Farms
Meta-analysis
Planting systems
Soil
Soil organic carbon
Straw returning
Zea mays
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Summary:The straw returning technique is one of the important measures for soil carbon sequestration and soil organic carbon (SOC) promotion in the world. However, the patterns of straw utilization in China with various methods among regions, the effect and variability of straw returning on SOC in different areas of China remain uncertain. We conducted a meta-analysis of 446 sets of data from 95 studies in China field to explore how the environmental factors and field management affect SOC after straw returning. The results showed that straw returning to the field significantly increase SOC content by an average of 13.97% (n = 446). The SOC increased effects are more obvious under areas with mean annual precipitation (MAP) > 500 mm, temperature (MAT) > 10 °C, loam or sandy soil, or the initial SOC content
ISSN:0301-4797
1095-8630
DOI:10.1016/j.jenvman.2021.112391